docs: def get_filenames(self):
          """Find all matching file names in the world folder.
          
          This method is private, and it's use it deprecated. Use get_regionfiles() instead."""
          # Warning: glob returns a empty list if the directory is unreadable, without raising an Exception
          return list(glob.glob(os.path.join(self.worldfolder,'region','r.*.*.'+self.extension)))